Features: Permits flow in one direction and closes automatically if the flow reverses. Strictly Confirming to international standards. Available in rubber seating & metal seating Wafar type sleek design to allow maximum flow Suitablity : Water Oil Composition: Sr no. Components Material 1 Body Cast Iron, Ductile Iron, Cast Steel 2 Disc Bronze, Stainless Steel 3 Seat Nitrile, EPDM, Buna N 4 Spring Stainless steel 5 Hinge pin and Stop pin Stainless Steel 6 Washers PTFE 7 Plugs Carbon steel